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Sammanfattning

The purpose of this work is to develop a simple, cheap and reproducible method for the synthesis of stable magnetic fluid nanocomposite chitosan/magnetite with particle size less than 100 nm and to study some of its physical and chemical properties. As a result, the method of synthesis of polyfunctional hybrid magnetic liquid nanocomposite chitosan/magnetite/sodium oleate with multilevel architecture was developed. With methods of small-angle neutron scattering, infrared Fourier spectroscopy, and transmission electron microscopy the structural characterization of the obtained magnetic nanofluids was performed. The formation of aggregates in magnetic fluids is established based on results from small-angle neutron scattering. The scattering signal from fractal particles was obtained simultaneously with the signal of small-angle neutron scattering for polydispersed spherical particles in the studied liquid systems. The mechanism of interaction of sodium oleate with chitosan in the system of chitosan/magnetite/sodium oleate is proposed. It has been shown that the binding between magnetite/sodium oleate and chitosan can be explained by the electrostatic interaction between a positively charged chitosan molecule and negatively charged coating of sodium oleate on the surface of magnetite. Strong electrostatic interaction also leads to the proton transfer from oleic acid to chitosan, thus creating a stable complex. The synthesized nanocomposite can be potentially used for targeted drug delivery and deposition of drugs in target cells and organs, for the diagnostics and therapy of diseases at the cellular level.

Nyckelord

Chitosan; Hierarchical nanostructure; Magnetite nanoparticles; Nanofluids; Small-angle neutron scattering

Publicerad i

Journal of Nano- and Electronic Physics
2019, volym: 11, nummer: 4, artikelnummer: 04017
Utgivare: Sumy State University

SLU författare

UKÄ forskningsämne

Fysikalisk kemi

Publikationens identifierare

  • DOI: https://doi.org/10.21272/jnep.11(4).04017

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/129924